Tube cleaning machine



FIG. 1 is a front, top, right perspective view of a tube cleaning machine, showing our new design;

FIG. 2 is a front, bottom, left perspective view thereof;

FIG. 3 is a front side elevation view thereof;

FIG. 4 is a rear side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Broken lines show portions of the tube cleaning machine that form no part of the claimed design. 

CLAIM The ornamental design for a tube cleaning machine, as shown and described. 